Originally Posted by Karl.Luhr
I was re-reading these posts and noticed no one listed a case trimmer. If you load a case enough times probably 4 or 5 you will need to trim it. The easiest way is with the rotary case trimmers. You will also need a micrometer to check the case before and after trimming. There is also a little tool that champhers the end of the case after trimming. Is sounds like you will be buys stuff forever but it will last a life time.
And it is fun...
I know what you meant, but for those that are new to reloading, to reliably check your over all case length, you will need a vernier caliper, not a micrometer. except for special use requirements, micrometers are generally for measuring small components 1.5 " or less. a 6" vernier caliper is pretty much a standardly available instrument and can be had for a reasonable am out.